ios - 无法使用 'ios:' .concat(data) 在 iOS 的 Web View 中从服务器调用数据

Question

我正在创建一个应用程序，它加载页面的 WebView 以从 WebView 获取数据并将数据保存到 iOS 应用程序中的本地 SQLite 数据库。目前面临的问题是，虽然 WebView 提醒数据，但我无法在 Web View Delegate 中接收数据，即:我尝试在 Web View Delegate 区域的日志中打印甚至它都没有显示。

URL : http://35.161.118.210/list/12345.html

服务器页面数据

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>

<script>
    setInterval(function(){
        var data = "Notice 1:::Notice 2:::Notice 3:::Notice 4:::Notice 5:::Notice 6";
            if(data.length > 5){
            window.location  =  'ios:'.concat(data);
            $('#notice').text("Unread Notice");
            alert(data);
            }
        }, 5000);
</script>

网页 View 加载

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height-64)];
    NSString *htmlFile = [[NSUserDefaults standardUserDefaults] objectForKey:USER_CODE];
    NSURL *url = [NSURL URLWithString:htmlFile];
    [webView loadRequest:[NSURLRequest requestWithURL:url]];
    [self.view addSubview:webView];
}

Web View 委托(delegate)

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    NSString *strResponse = [[request URL] absoluteString];

    NSLog(@"Value retured : %@",strResponse);

    if ([strResponse hasPrefix:@"ios:"]) {

        NSString *newString = [strResponse substringFromIndex:[@"ios:" length]];
        newString = [newString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

        NSLog(@"Value retured : %@",newString);

        UIAlertView *uiAlert = [[UIAlertView alloc] initWithTitle:@"Message" message:newString delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
        [uiAlert show];

        NSArray *arrItems = [newString componentsSeparatedByString:@":::"];
        for (NSString *strItems in arrItems) {

            [strItems stringByRemovingPercentEncoding];
            NSMutableDictionary *mDic = [[NSMutableDictionary alloc] init];
            [mDic setObject:strItems forKey:@"item_name"];
            [mDic setObject:@"0" forKey:@"is_deleted"];
            [[DataBase connection] insertTableData:mDic AndTableName:@"school_feed"];
        }

        return NO;
    }
    return YES;
}

信息.plist

Answer 1

在您的 Webview Load 中添加以下代码

webView.delegate = self

例如:

网页 View 加载

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height-64)];
    NSString *htmlFile = [[NSUserDefaults standardUserDefaults] objectForKey:USER_CODE];
    NSURL *url = [NSURL URLWithString:htmlFile];
    webView.delegate = self;
    [webView loadRequest:[NSURLRequest requestWithURL:url]];
    [self.view addSubview:webView];
}